Benadryl which can also be called Diphenhydramine works effectively to minimize histamine (it is released when reacting to allergies) in the human body. Diphenhydramine can work for the treatment of Parkinson’s disease symptoms and allergy symptoms.

Pharmacological Action

Benadryl is a very potent drug that its use may at times result in dizziness. If this occurs, ensure you keep away from automobiles and from every other activity that requires your activeness. Don’t use Benadryl as a sleeping drug on a child. Avoid giving Benadryl to a child less than 2 years old.


Diphenhydramine as a drug to reduce the effects of histamine works for the treatment of the symptoms of reactions to allergies, common cold, and hay fever. It helps with relaxation and sleeping. You can use it for the treatment and prevention of nausea, dizziness, and vomiting. Seek the advice of your doctor before using Benadryl for the symptoms of cold in children less than 6 years of age. Do a thorough verification of drug use on children before use. Ensure you adhere to all instructions given in order to be free from severe side effects.

Mode of Indication, Dosage, and Duration of Treatment

You are advised to follow strictly the instructions given by your doctor or on the prescriptive label in relation to the number of dosages and then the time range given Children less than 2 years old must be restricted from this drug usage and make sure you seek your doctor’s advice before you give a child a cold or cough drug. The side effect may be death for children if misused. Do an accurate measurement with your syringe or spoon when taking the liquid form of the medicine. Take Benadryl 30minutes to bedtime (as a sleeping pill) and to motion sickness situation after a long car ride, airplane travel, etc. Inform your doctor if there is no improvement in the treatment of the symptoms after 7 days or if you start experiencing fever alongside headache, skin rash or cough.


Avoid the use of Benadryl if you are allergic to it. Seek the advice of your doctor whether there won’t be side effects if Benadryl is used when under medical problems such as a blockage in your digestive tract, urination problems, a colostomy, liver or kidney disease, asthma, breathing disorder, cough, heart disease, glaucoma, a thyroid disorder. Pregnant women and lactating mothers must make adequate inquiries before Benadryl usage.

Side Effects

Rapidly request for medical attention when you begin to see the symptoms of allergic reactions such as when your throat, face, tongue, and lips are swelling up, hives and it when it seems difficult for you to breath as a result of Benadryl use. Some side effects may be:

  • Dizziness;
  • Dry mouth;
  • Constipation;
  • Blurred vision;
  • Drowsiness during the day.

Missed Dose

Benadryl is used when needed which shows it might not require a planned moment of use. Ensure you don’t take more than the required number of dosage. The time for the next dose should be considered in taking the missed dose.


Based on the fact that Benadryl is used when needed, there is, therefore, no specific set time for drug usage. If you are however on a schedule, use the missed dose as soon as you remember. Ensure you don’t take more than what is prescribed. If accidentally taken, seek the help of your doctor.

Interaction with Other Drugs

It is advisable to seek the help of your doctor before interacting Benadryl with other new medications such as cough, allergy cold or sleep drugs. This can result in severe side effects. In addition, the side effects of Diphenhydramine can be increased by the intake of alcohol.